Poor hot starting tdi

[bluequattro]

Hi guys, it's a vw sharan 115 bhp
Fine cold start
Poor hot start, churns away before fires
Likely cause? I m thinking temp sensor first, gauge doesn't work either

[Nuno Cristiano]

You can do it via ECU

[Monkeymagic]

need a vcds scan mate. Temp sender is most likely candidate mate. Cam sensor (G40) causes similar hot start problems. regards Steven.

[Monkeymagic]

Just read temp gauge playing up. Defo temp sender buddy. Buy genuine not aftermarket tosh. About £25 including o ring.

[macspring]

Bq,

This happened to a VW Touran, and the cause was the battery. It didn’t have enough power to turn over the TDI engine fast enough when the engine was hot. A new battery cured it for the car.

Easy for you to check as the first item without trying out everything else first.

HTH.

Thanks.

[5cylinderman]

Have you tried to bump start it whilst hot? Does it burst into life with no smoke from your tail pipe?
If you are worried about your battery try starting it using jump leads from another vehicle.
When the vehicle is reluctant to start "hot", go to your fuel filler cap and release it. Does it make a whoosh sound as you release it? (blocked breather)
My apologies for the silly sounding queries but I have seen some big faults on PD Tdi's that were cured by cheap repairs.